CN102391846B - Sulfur solvent for controlling or remitting sulfur deposition - Google Patents
Sulfur solvent for controlling or remitting sulfur deposition Download PDFInfo
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- CN102391846B CN102391846B CN 201110101484 CN201110101484A CN102391846B CN 102391846 B CN102391846 B CN 102391846B CN 201110101484 CN201110101484 CN 201110101484 CN 201110101484 A CN201110101484 A CN 201110101484A CN 102391846 B CN102391846 B CN 102391846B
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Abstract
The invention relates to a sulfur solvent for controlling or remitting sulfur deposition, comprising the following components in percentage by weight: 50-90% of sulfur solvent, 1-15% of corrosion inhibitor and 5-40% of carrier oil; the sulfur solvent comprises a compound with a molecular formula of R1-C10H7 or R1-C10H6-R2, wherein R1 and R2 are selected from branched or unbranched and saturated or unsaturated C1-C7 alkyl groups or alkyl-alkene groups; the corrosion inhibitor comprises a compound with a molecular formula of R1-SH-R-R2, wherein R1 is a short-chain alkyl group or a carboxyl group, R is an imidazoline ring having C7-C17 alkyl branched chains, and R2 is an alkyl group or an amide alkyl group; and the carrier oil is CH3(R)aCH3, wherein R is a linear-chain alkyl group or a branched alkyl group. When the temperature of the solvent is 80 DEG C, 17.5g of elemental sulfur can be dissolved in 100g of sulfur solvent; and when the elemental sulfur and the sulfur solvent are mixed in the proportion of 1:1, the oil-water ratio is 1 after the elemental sulfur and the sulfur solvent are separated for 5min.
Description
Technical field
The present invention relates to a kind of solvent formula that is used for the particularly acidic aqueous gas well natural gas exploitation of Natural gas extraction control element sulphur deposition, promptly a kind of sulphur solution formula that causes down-hole oil tube passage or surface gathering and transferring line clogging in order to control or alleviation because of the elementary sulfur deposition.
Background technology
The contriver has carried out a large amount of literature retrievals and analysis to domestic related data, typical C N89107731.6 " preparation method of sulfur solvent compositions " for example, be to be the sulphur solvent with the polysulfide that is added with primary amine and secondary amine catalyst, it has the higher elementary sulfur ability of removing, but foul smell is extremely strong, strong toxicity (medium lethal dose (rat sucks) 0.01mg/L); In addition, this sulphur solvent lures easily that under sour environment down-hole or ground material corrode into, and the evaluation of ASRL is tested data and shown: at 140 ℃, and H
2Under S dividing potential drop 30% condition, add diaryl two sulphur sulphur solvents and not only exist unstable problem of decomposing, Corrosion rate in Carbon Steel also rises to 9.9314mm/a by 0.3556mm/a.USP4322307 and USP 20090136414 have all introduced a kind of sulphur solvent based on alkylnaphthalene, this alkylnaphthalene mixture sulphur solvent is by eliminating the elementary sulfur deposition in gas well down-hole or the surface gathering and transferring pipeline to the physical dissolution ability of elementary sulfur, foul smell and toxicity have been avoided in its application, but still unresolved sulphur solvent is especially dissolving the localized corrosion problems that the sulphur solvent causes metal material behind the elementary sulfur, in addition proportion (the 1.001g/cm of described solvent
3) approaching with gas-field water proportion, the oil-water emulsion phenomenon can appear when being applied to produce the aqueous vapor well, and reduce molten sulphur ability and cause the solvent later separation to reclaim difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of local corrosion, isolating sulphur solvent of solution sulphur solvent chance emulsifying water that in producing the aqueous vapor well, can suppress or slow down the elementary sulfur deposition, eliminate or alleviate the sulphur solvent to carbon steel.
A kind of sulphur solvent formula that aqueous vapor well down-hole oil tube and surface gathering and transferring equipment interior element sulphur deposition are produced in peracidity control, sulfur-bearing solvent, inhibiter, carrier oil in the prescription of being used for of the present invention.Wherein the basic comprising of sulphur solvent is to have R
1-C
10H
7Or R
1-C
10H
6-R
2The compound of molecular formula, R
1, R
2Be selected from alkyl or the alkane thiazolinyl of C1～C7; The basic comprising of inhibiter is the sulfur-bearing imidazolidine derivatives, comprises alkyl branches, amide group and the sulfydryl of a tetrahydroglyoxaline ring texture, C7～C17.Its molecular structural formula can be expressed as: R
1-SH-R-R
2, R wherein
1Be selected from short-chain alkyl, carboxyl, R is the tetrahydroglyoxaline ring that contains alkyl branches, R
2Be selected from alkyl, acid amides alkyl.This prescription can solve the sulphur solvent to 20# pipe line steel, L245 pipe line steel, the localized corrosion problems of L360 pipe line steel in oil gas is carried; Alkane carrier oil proportion is lighter, as CH
3(R) aCH
3R can be straight chain or has the alkyl of side chain, a is at 4～8, carrier oil has reduced the proportion of sulphur solvent on the one hand, avoided producing the emulsification problem that the sulphur solvent is used in the aqueous vapor well, oily water separation efficient is reached more than 90%, improve solvent recovering rate, carry oil on the other hand and alleviate the function of oil-water emulsion problem except that having the sulphur of adjusting solvent proportion, also possesses cleaning function to oil soluble long chain alkane heavy hydrocarbon compounds common in the elementary sulfur settling of down-hole, improve the sulphur solvent to the sedimental removing effect of elementary sulfur, recover the clean level of pipeline and equipment internal surface, reduce the possibility that elementary sulfur deposits absorption once more.
So so elementary sulfur solvent formula involved in the present invention has original function at aspects such as elementary sulfur dissolving, corrosion control, oil-water emulsion control, heavy hydrocarbon compounds cleanings.
The basic general formula of sulphur Oil solvent of the present invention:
The naphthalene class is R
1-C
10H
7Or R
1-C
10H
6-R
2, R
1, R
2Be selected from alkyl or the alkane thiazolinyl of C1～C7.
The derivative of sulfur-bearing tetrahydroglyoxaline is R
1-SH-R-R
2, R wherein
1Being selected from is short-chain alkyl, carboxyl etc., and R is the tetrahydroglyoxaline ring that contains alkyl branches, R
2Be selected from alkyl, acid amides alkyl, can be-CO
2H ,-SO
3H ,-PO
3H
2, CO
2R
5,-CONH
2,-CONHR
5, R
5Be selected from the alkyl that contains 1-8 carbon atom, aryl, alkylaryl, cycloalkyl.
Alkanes CH
3(R) aCH
3The alkane compound of structure, wherein R is straight chain or the alkyl that has side chain, a is 4～8.
Weight percent in the prescription
The naphthalene class is 50～90%, and wherein the best is 75～85%.
The derivative 1～15% of sulfur-bearing tetrahydroglyoxaline, wherein the best is 1～5%.
Alkanes 5～40%, wherein the best is 10～20%.
The effect of invention
Sulphur solvent formula disclosed in this invention is a kind of elementary sulfur solvent formula that is used for moisture gas well.Be applicable to that the elementary sulfur that produces aqueous vapor well down-hole, surface gathering system removes sulphuring treatment.Its molten sulphur ability strengthens with the rising of temperature, when solvent temperature is 80 ℃, and the elementary sulfur of 100g sulphur solvent solubilized 17.5g.Sulphur solvent proportion 0.85～0.97g/cm
3, easily separated with not emulsification after gas-field water mixes, under 1: 1 blending ratio, separate water oil ratio behind the 5min near 1.
This sulphur solvent formula to the corrodibility of sulfur-bearing gas field commonly used metal material L360, L245 etc. only be alkylnaphthalene class sulphur solvent to equal material corrosive 30%, overcome local corrosion substantially, applicable to long-term circulation sulphur removal application art; The sulphur solvent formula also has the dissolving cleaning performance to long-chain macromolecule alkane settling common in gas well down-hole and the surface gathering system in addition, and it is little to be particularly useful for removing the elementary sulfur deposition, the situation of elementary sulfur and the coexistence of down-hole long chain alkane mixed type settling.
Description of drawings
Fig. 1 sulphur solvent down-hole circulation technology
Wherein: 1-dispenser pump, 2-sleeve pipe, 3-oil pipe, 4-separator, 5-sedimentation strainer.
Embodiment
Because sulphur solvent of the present invention is along with temperature reduces, its elementary sulfur solubleness descends thereupon.Therefore can adopt solvent temperature drop reprocessing cycle down-hole desulfurization process as shown in Figure 1.Being poor sulphur solvent injects shaft bottoms by dispenser pump 1 by casing annulus 2, returns out and dissolves down-hole elementary sulfur settling from oil pipe 3.After separating through separator 4, the solvent that is rich in elementary sulfur enters that sedimentation strainer 5 is lowered the temperature, elementary sulfur removes.Removing poor sulphur solvent behind the elementary sulfur enters down-hole circulation sulphur removal once more and uses.
Embodiment 1, molten sulphur merit rating
Evaluation method: in Erlenmeyer flask, add 100ml sulphur solvent, open thermostat the sulphur solvent is heated to 80 ℃ of following constant temperature.Take by weighing a certain amount of elementary sulfur, join in the Erlenmeyer flask, open magnetic stirring apparatus.The molten sulfur solubility of elementary sulfur behind the mensuration 2h.
Having prepared test number according to the described method of this patent is the elementary sulfur solvent formula of S1～S5, its elementary sulfur dissolving power evaluation the results are shown in Table 1.S2 number prescription sulphur solvent elementary sulfur dissolving power sees Table 2 under the differing temps.
The molten sulphur evaluation result of table 1 sulphur solvent
The molten sulphur evaluation result of sulphur solvent under table 2 differing temps
Embodiment 2, corrodibility evaluation
Test condition: 80 ℃ of temperature, normal pressure, test period 72h, test material L360.
Test procedure: the 650ml sulphur solvent of in 1000ml tool plug port grinding bottle, packing into, on the special glass hanger, hang two L360 test pieces of crossing by standard cleaning, put into the water bath with thermostatic control under 80 ℃.Take out test piece behind the 72h, clean test piece by the corrosion test standard-required and weigh, calculate corrosion weight loss speed.The results are shown in Table 3.
Table 3 corrosion test result
| The sulphur solvent | Erosion rate, mm/a | Etch state |
| Methylnaphthalene | 0.0198 | Pitting corrosion, local corrosion |
| S1 | 0.0058 | Test piece light, uniform corrosion |
| S2 | 0.0059 | Test piece light, uniform corrosion |
| S3 | 0.0032 | Test piece light, uniform corrosion |
| S4 | 0.0012 | Test piece light, uniform corrosion |
| S5 | 0.0016 | Test piece light, uniform corrosion |
Embodiment 3, oily water separation evaluation
Test condition: 20 ℃ of temperature, normal pressure.
Test procedure: with ratio is that 1: 1 sulphur solvent and proportion are 1.05 salt water mixed liquid up-down vibration or stirring, makes its emulsification, estimates its emulsification tendency and oil-water separation with the degree of stability of emulsion.If layering is fast, water outlet is many, and milk sap is unstable more, and then the emulsification tendency is just more little.Table 4 is an evaluation result.
Table 4 sulphur solvent oil water sepn is estimated
Claims (2)
1. a control or alleviate the sulphur solvent of sulphur deposition is characterized in that: be grouped into by following one-tenth by weight percentage:
(A), sulphur solvent: molecular formula is R
1-C
10H
7Or R
1-C
10H
6-R
2Compound, R wherein
1, R
2Be selected from the band side chain or be not with side chain, saturated or undersaturated C
1To C
7Alkyl or alkane thiazolinyl; Weight percentage is 50～90%;
(B), inhibiter: molecular formula is R
1-SH-R-R
2Compound, R
1Be short-chain alkyl, carboxyl; R contains C
7～C
17The tetrahydroglyoxaline ring of alkyl branches, R
2Be alkyl, the acid amides alkyl; Weight percentage is 1～15%;
(C), carrier oil is CH
3(R) aCH
3, wherein R is straight chained alkyl or branched alkyl, a is 4～8; Weight percentage is 5～40%.
2. the application of the sulphur solvent of control according to claim 1 or alleviation sulphur deposition is characterized in that:
Be used to produce the sulphuring treatment that removes of aqueous vapor well down-hole, surface gathering system; When solvent temperature is 80 ℃, the elementary sulfur of 100g sulphur dissolution with solvents 17.5g; Under 1: 1 blending ratio, the water oil ratio of separating behind the 5min is 1.
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| CN 201110101484 CN102391846B (en) | 2011-04-22 | 2011-04-22 | Sulfur solvent for controlling or remitting sulfur deposition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110101484 CN102391846B (en) | 2011-04-22 | 2011-04-22 | Sulfur solvent for controlling or remitting sulfur deposition |
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| CN102391846A CN102391846A (en) | 2012-03-28 |
| CN102391846B true CN102391846B (en) | 2013-07-31 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143533B (en) * | 2012-09-03 | 2014-01-22 | 濮阳市德胜实业有限公司 | Cleaning and blockage relieving technology of gathering and transportation system for oil and natural gas field highly containing sulfuric acid |
| CN103566701B (en) * | 2013-09-06 | 2015-08-05 | 中国石油大学(华东) | A kind of gathering system sulphur deposition brings out capturing device |
| CN106498405B (en) * | 2016-11-04 | 2018-12-14 | 付海明 | Oil-soluble inhibitor and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050537A (en) * | 2006-04-04 | 2007-10-10 | 中国石油天然气股份有限公司 | Corrosion inhibitor for restraining metal corrosion, and preparation method |
-
2011
- 2011-04-22 CN CN 201110101484 patent/CN102391846B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050537A (en) * | 2006-04-04 | 2007-10-10 | 中国石油天然气股份有限公司 | Corrosion inhibitor for restraining metal corrosion, and preparation method |
Non-Patent Citations (4)
| Title |
|---|
| "元坝高含硫气藏沉积预测及防治";史雪枝;《内蒙古石油化工》;20110131(第1期);第44-46页 * |
| "硫溶剂在国外高含硫气田中的应用";凃彦等;《石油与天然气化工》;20081231;第37卷(第1期);第44-47页 * |
| 凃彦等."硫溶剂在国外高含硫气田中的应用".《石油与天然气化工》.2008,第37卷(第1期),第44-47页. |
| 史雪枝."元坝高含硫气藏沉积预测及防治".《内蒙古石油化工》.2011,(第1期),第44-46页. |
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